#menu {
    display: none;
    height: 100%;
    background-color: rgb(255, 255, 255);
    position: fixed;
    z-index: 3;
    left: 0;
    top: 0;

    animation-name: enter;
    animation-duration: 0.6s;
    animation-direction: normal;
    animation-timing-function: ease;
}

#user {
    text-align: right;
    border: none;
    position: absolute;
    right: 7%;
    top: 3%;
    z-index: 2;
}

@keyframes enter {
    from {
        left: -200px;
        opacity: 0;
    }

    50% {
        opacity: 0.5;
    }

    to {
        left: 0;
        display: block;
        opacity: 1;
    }
}

@keyframes leave {
    from {
        left: 0;
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }

    to {
        left: -200px;
        display: none;
        opacity: 0;
    }
}

#mask{ 
    position:absolute;left:0px;top:0px;
    background:rgba(0, 0, 0, 0.4);
    width:100%;
    height:100%;
    filter:alpha(opacity=60);
    opacity:0.6;
    display:none; 
    z-Index:2;  
}

#container {
    background-color: white;
    height: 100%;
    width: 100%;
    position: relative;
    z-index: 1;
}

#menu ul {
    height: 100%;
    display: flex;
    flex-direction: column;
    margin: 0px;
    padding: 0;
    justify-content:center;
}

#user ul {
    padding: 0px;
}

#menu li {
    list-style: none;
    max-height: 1em;
    padding-left: 20px;
    padding-right: 20px;
    padding-top: 37%;
    padding-bottom: 32%;
    padding-top: 32%;
    height: 25%;
    flex: 1;
    text-align: center;
}

#menu li:link {
    color: black;
}

#menu li:hover {
    background-color: #8080804f;
}

#user li {
    list-style: none;
    padding: 4%;
}

#enter{
    border: none;
    background-color: white;
    position: absolute;
    left: 3%;
    top: 4%;
    z-index: 2;
}


#exit{
    border: none;
    position: absolute;
    right: 3%;
    top: 4%;
    z-index: 2;
}

#exit:hover {
    text-decoration-color: black;
    text-decoration-line: underline;
    text-decoration-thickness: 2px;
    text-decoration-style: solid;
}

#leave{
    border: none;
    background-color: white;
    position: absolute;
    left: 37%;
    top: 4%;
    z-index: 3;
}

a {
    font-size: large;
    color: rgb(0, 0, 0);
}

a:link {
    text-decoration: none;
}

a:hover {
    text-decoration-color: black;
    text-decoration-line: underline;
    text-decoration-thickness: 2px;
    text-decoration-style: solid;
}

img {
    color: grey;
}

img:hover {
    color:black;
}




